Motor-armature



(No Model.) 2 SheetsSheet 1.

J. G. HENRY.

MOTOR ARMATURE. No. 516,807. Patented Mar. 20, 1894.

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UNITED STATES PATENT OFFICE.

JOHN C. HENRY, OF "VESTFIELD, NElV JERSEY.

MOTOR-ARMATU RE.

SPECIFICATION forming part of Letters Patent N 0. 516,807, dated March 1894- Application filed August 25, 1892. Serial No. 44 L053. (No model.)

To all whom, it may concern.-

Be it known that 1, JOHN C. HENRY, a citizen of the United States, residing at Westfield, county of Union, State of New Jersey, have invented certain new and useful improvements in the Construction. of Motor-Armatures, of which the following is a specification.

My invention relates to armatures for electric motors, and its object is to facilitate the construction and repair of armatures.

The invention consists briefly, of an armature built up in interchangeable sections removably connected together, so that any section can be readily taken out when desired.

In the drawings, Figure 1, is a longitudinal central section of my improved armature. Fig. 2 is a View of the left hand end, the commutator being removed. Fig. 3 is a View of the right hand end. Figs. i, 5, 6 and 7 are details.

Keyed upon the shaft A are two parallel supports or frames, such as disks or spiders B, B, each of which has a series of inwardly projecting fingers Z). The arms of the spiders correspond in number with the sections of the armature. Each section comprises a core, composed of a plurality of iron plates cinsulated from each other. The plates are seg ments of a circle, so that when the proper number are assembled a ring-shaped core 0 is formed. The edges of the plates are rabbeted on their outer corners, the meeting rabbets forming a groove, preferably V-shaped, in which is received a key or clamping bar D, one end of which enters a socket or hole in the end of an arm of the spider B. The other end of the bar is bent to pass through a perforated lug h on the spider B, where it is secured by a suitable fastening device, such as the nut d.

In order to avoid the induction of current by the clamping bars, one end of each bar may be insulated from the armature spider. This is preferably done by inserting a bushing d of insulating material in the hole in the spider through which the threaded end of the bar passes.

Each section of the laminated core is wound with a single coil of flat iron wire E placed on edge, and held down upon the core by bands F which have flanged edges nipped beneath the bars D. Each coil of wire has an insulated portion such as the rigid contact piece e against which bears a bar G of the commutator, which is sprung outward so that the centrifugal force tends to press it still more firmly against the contact piece of the coil. The bars may have shallow recesses g to receive the contact pieces and prevent accidental displacement.

It is preferred to clamp together the plates forming a section of the core and wind them by machinery, thus making them all alike and interchangeable. To remove any section from a completed armature, it is simply necessary to unfasten two bars on each side of the section, lift their ends out of the lugs on the spider 3', and then pull them lengthwise from the spider B. The fact that the coils have only a superficial contact with the bars G of the commutator, facilitates the removal of the sections a or of the commutator G.

It is evident that the rabbets may be on the inner corners to fit over the fingers Z), or that they may be omitted altogether; but it is preferred to use them for the sake of greater solidity.

I am aware of the United States patent to J. W. Easton, No. 373,971, in which the terminals of the bobbins of the armature coils are connected with the commutatorsegments, by means of a yielding coupling, such as a coil spring extending between the end of each bobbin and the corresponding commutator plate, so that the armature coils and the commutator may move relatively to each other without breaking the connection or injuring the parts. My invention is distinguished from this construction in that the armature coil is in direct contact with the commutator plate or bar, without any yielding coupling interposed between them.

What I claim as new, and desire to secure by Letters Patent, is-

1. An armature consisting of segmental laminated core sections suitably wound, spiders at each end of the core, and clamping bars seated in longitudinal grooves in the outer surfaces of the sections and holding the sections upon the spiders, substantially as described.

2. An armature consisting. of segmental laminated core sections suitably wound, and having rabbeted outer corners, spiders at each end of the core, and clamping bars received in the rabbets and fastened to the spiders, substantially as described.

3. An armature whose coils havea loose but direct superficial contact with the commutator bars, substantially as described.

4.. An armature whose coils each have an uninsulated portion bearing directly against but not fastened to the commutator segment, substantially as described.

5. An armature whose coils each have an uninsulated portion bearing directly against a resilient commutator bar, substantially as described.

6. An armature composed of segmental removable sections whose coils each have a rigid contact piece bearing against its commutator bar, substantially as set forth.

7. An armature composed of segmental removable sections whose coils each have a rigid contact piece bearing against a resilient commutator bar, substantially as set forth.

8. An armature composed of segmental removable sections whose coils each have a rigid contact piece bearin g against a resilient commutator bar, which slants outward, substantially as set forth.

9. An armature consisting of two spiders, B, B, having fingers b, core sections a suitably wound and resting on said fingers, and having rabbeted edges, bars D received in said rabbets and removably fastened to said spiders, and bands F passing over said sections and clamped under the bars D, substantially as setforth.

10. The combination, with a shaft, of suitable supporting frames, an armature-core supported by said frames, and clamping bars insulated. at one end from said frames, substantially as set forth.

11. The combination,with the spiders having perforations, of the core sections, the clamping bars inserted in the perforations, and the insulating bushings interposed between the bars and the spiders, substantially as described.

In witness whereof I have hereunto set my hand this 15th day of July, 1892.

JOHN G. HENRY.

Witnesses:

SUSIE A. HENRY, SADIE HENRY. 

